Description: Fix waitpid with -lpthread on s390{,x}, mips64, ia64
 On these four architectures waitpid() was defined as a strong function
 in libc directly, instead of having a weak alias to __libc_waitpid.
 Due to the unavailability of __libc_waitpid for this reason, linking
 against -lpthread was not possible in many cases. Follow the scheme
 for waitpid that is used on other architectures to make linking
 against -lpthread work again.
Author: Christian Seiler <christian@iwakd.de>
Bug-Debian: https://bugs.debian.org/844781
Last-Update: 2017-01-05
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
--- a/ia64/__waitpid.c
+++ b/ia64/__waitpid.c
@@ -1,6 +1,10 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
-pid_t waitpid(pid_t pid, int * wait_stat, int flags) {
+pid_t __libc_waitpid(pid_t pid, int * wait_stat, int flags);
+pid_t __libc_waitpid(pid_t pid, int * wait_stat, int flags) {
   return wait4(pid, wait_stat, flags, 0);
 }
+
+pid_t waitpid(pid_t pid, int * wait_stat, int flags)
+__attribute__((weak,alias("__libc_waitpid")));
--- a/s390/__waitpid.c
+++ b/s390/__waitpid.c
@@ -1,6 +1,10 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
-pid_t waitpid(pid_t pid, int * wait_stat, int flags) {
+pid_t __libc_waitpid(pid_t pid, int * wait_stat, int flags);
+pid_t __libc_waitpid(pid_t pid, int * wait_stat, int flags) {
   return wait4(pid, wait_stat, flags, 0);
 }
+
+pid_t waitpid(pid_t pid, int * wait_stat, int flags)
+__attribute__((weak,alias("__libc_waitpid")));
--- a/s390x/__waitpid.c
+++ b/s390x/__waitpid.c
@@ -1,6 +1,10 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
-pid_t waitpid(pid_t pid, int * wait_stat, int flags) {
+pid_t __libc_waitpid(pid_t pid, int * wait_stat, int flags);
+pid_t __libc_waitpid(pid_t pid, int * wait_stat, int flags) {
   return wait4(pid, wait_stat, flags, 0);
 }
+
+pid_t waitpid(pid_t pid, int * wait_stat, int flags)
+__attribute__((weak,alias("__libc_waitpid")));